基于GIS的水下隧道突水危险性评价——以武汉长江隧道江底段为例
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摘要
文章应用GIS系统和数值模拟技术,以武汉长江隧道为例,对水下隧道突水危险性进行了分析评价。首先对隧道纵剖面和横剖面进行单元划分,然后将数值模拟成果转换到GIS中,以形成突水危险性评价数据库;在数据库支持下,对每个评价单元应用摩尔-库仑准则判断剪切破坏,应用最大拉应变准则判断拉伸破坏,将达到破坏标准的单元定义为突水单元;再对隧道同一横剖面的突水单元分布进行分析,搜寻潜在的突水通道;最后根据搜寻结果及突水单元的比例,结合江底段地表允许沉降控制标准进行突水危险性的划分。分析计算结果表明,武汉市过江隧道江底段纵剖面中,突水危险单元占本段72%,突水安全到危险过渡单元占19%,突水安全单元占9%;存在潜在突水通道的单元占江底段的12%,在施工过程中需要高度重视。
Using the Yangtze RiverTunnel as an example, the risk assessment of a water burst in an underwater tunnel was carried out using a geographic information system(GIS) and numerical simulation. Firstly, the assessment units were divided on the horizontal and longitudinal sections of tunnel. Secondly, the data obtained by numerical simulations were converted in the GIS to form a relative database which can judge the shear failure and tensile failure in each assessment unit by the Mole-Coulomb criteria and maximum tensile strain criteria, respectively. Thirdly,each unit of water burst in the horizontal section was analyzed to search for potential passage for a water burst. Finally, the water-burst risk level was classified based on the above results and the percentages of water burst units as well as the allowable settlement standard. As for the water burst risk, the analyzed and calculated results show that it is 72% for the risky units, 19% for the moderate units, 9% for the safe units in the longitudinal profile, and 12% for the units with potential water burst passages, to which a high level of attention should be paid.
Using the Yangtze RiverTunnel as an example, the risk assessment of a water burst in an underwater tunnel was carried out using a geographic information system(GIS) and numerical simulation. Firstly, the assessment units were divided on the horizontal and longitudinal sections of tunnel. Secondly, the data obtained by numerical simulations were converted in the GIS to form a relative database which can judge the shear failure and tensile failure in each assessment unit by the Mole-Coulomb criteria and maximum tensile strain criteria, respectively. Thirdly,each unit of water burst in the horizontal section was analyzed to search for potential passage for a water burst. Finally, the water-burst risk level was classified based on the above results and the percentages of water burst units as well as the allowable settlement standard. As for the water burst risk, the analyzed and calculated results show that it is 72% for the risky units, 19% for the moderate units, 9% for the safe units in the longitudinal profile, and 12% for the units with potential water burst passages, to which a high level of attention should be paid.
引文
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[12]肖明清,邓朝辉,鲁志鹏.武汉长江隧道盾构段结构型式研究[J].现代隧道技术,2012,49(1):105-110Xiao Mingqing,Deng Chaohui,Lu Zhipeng.A Study of the Structure Typeofthe Shield-Driven Section of the Yangtze River Tunnel[J].Modern Tunnelling Technology,2012,49(1):105-110
[13]王金龙.武汉地铁越江盾构隧道纵向不均匀变形及力学特性研究[J].现代隧道技术,2012,49(3):87-93Wang Jinlong.Study of the Longitudinal Uneven Deformation and Stress State of the Shield Tunnel Crossing the Yangtze River[J].Modern Tunnelling Technology,2012,49(3):87-93
[14]肖明清.武汉长江隧道工程概况[J].土工基础,2005,19(1):2-4Xiao Mingqing.General Situation of Changjiang Tunnel Engineering in Wuhan[J].Soil Engineering and Foundation,2005,19(1):2-4
[15]李雪平,李云安,汪洋,等.基于GIS与数值模拟的三峡水库库首区诱发地震危险性评价[J].工程地质学报,2010,18(3):345 -350Li Xueping,Li Yun'an,Wang Yang,et al.GIS and Numerical Simulation Techniques Based Risk Assessment of Induced Earthquake in Three-Gorge Reservoir Head Area[J].Journal of Engineering Geology,2010,18(3):345-350
[2]曾超,邱祥波,李术才,等.海底隧道的数值模拟研究[J].岩石力学与工程学报,2003,22(z1):2264-2267Zeng Chao,Qiu Xiangbo,Li Shucai,et al.Numerical Simulation on Subsea Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(z1):2264-2267
[3]李术才,李廷春,陈卫忠,等.厦门海底隧道最小顶板厚度三维弹塑性断裂损伤研究[J].岩石力学与工程学报,200 4,23(18):3138-3143Li Shucai,Li Tingchun,Chen Weizhong,et al.Application of 3D Elasto-plastic Fracture DamageModel to Determination of Minimum Roof Thickness of Xiamen Subsea Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(18):3138-3143
[4]王刚,孔祥福,李术才,等.象山港海底隧道最小岩石覆盖厚度断裂损伤分析[J].岩土力学,2006,27(S):353-358Wang Gang,Kong Xiangfu,Li Shucai,et al.Fracture Damage Analysis of Rock Cover in Xiangshan Harbour Subsea Tunnel[J].Rock and Soil Mechanics,2006,27(S):353-358
[5]蒋树屏,刘元雪,谢锋,等.重庆市朝天门两江隧道越江段盾构法合理覆盖层厚度研究[J].岩石力学与工程学报,2007,26(6):1188-1193Jiang Shuping,Liu Yuanxue,Xie Feng,et al.Study on Reasonable Cover Thickness for Submarine Tunnel of Chaotianmen in Chongqing by ShieldConstruction[J].Chinese Journal of RockMechanics and Engineering,2007,26(6):1188-1193
[6]李树忱,张京伟,李术才,等.海底隧道最小岩石覆盖厚度的位移收敛法[J].岩土力学,2007,28(7):1443-1447Li Shuchen,Zhang Jingwei,Li Shucai,et al.Displacement Convergence Method for Minimum Rock Cover above Submarine Tunnel[J].Rock and Soil Mechanics,2007,28(7):1443-1447
[7]张明聚,郜新军,郭衍敬.海底隧道突水分析及其在翔安隧道中的应用[J].北京工业大学学报,2007,33(3):273-277Zhang Mingju,Gao Xinjun,Guo Yanjing.Analysis of Water Inrush in Undersea Tunnel and Its Application in Xiang'an Tunnel[J].Journal of Beijing University of Technology,2007,33(3):273-277
[8]沈荣喜,吴秀仪,刘长武,等.海底隧道施工过程中突水风险研究[J].武汉理工大学学报(交通科学与工程版),2008,32(3):385-388Shen Rongxi,Wu Xiuyi,Liu Changwu,et al.Research ofWaterInrush on Subsea Tunnel Construction[J].Journal ofWuhan University of Technology(Transportation Science&Engineering),2008,32(3):385-388
[9]许文峰.海底隧道突水涌泥机理及对策研究[J].海洋技术,2009,28(2):73-76XuWenfeng.Study on Mechanism and Countermeasure of Water Inrush and Burst Mud in Subsea Tunnel[J].Ocean Technology,2009,28(2):73-76
[10]李兵,张顶立,房倩,等.基于围岩变形控制的海底隧道突水安全风险分析[J].中国铁道科学,2010,31(2):84-89LiBing,Zhang Dingli,Fang Qian,et al.Analysis of Water Inrush Safety Risk of Subsea Tunnel Based on Rock Deformation Control[J].China Railway Science,2010,31(2):84-89
[11]武凡,刘洪震.大断面泥水盾构地表沉降控制及监测信息反馈技术[J].铁道勘察,2011,(1):104-107Wu Fan,Liu Hongzhen.Technology for Subsidence Control and Feedback of Monitoring Information for Large Cross Section Slurry Shield[J].Railway Investigation and Surveying,2011,(1):104-107
[12]肖明清,邓朝辉,鲁志鹏.武汉长江隧道盾构段结构型式研究[J].现代隧道技术,2012,49(1):105-110Xiao Mingqing,Deng Chaohui,Lu Zhipeng.A Study of the Structure Typeofthe Shield-Driven Section of the Yangtze River Tunnel[J].Modern Tunnelling Technology,2012,49(1):105-110
[13]王金龙.武汉地铁越江盾构隧道纵向不均匀变形及力学特性研究[J].现代隧道技术,2012,49(3):87-93Wang Jinlong.Study of the Longitudinal Uneven Deformation and Stress State of the Shield Tunnel Crossing the Yangtze River[J].Modern Tunnelling Technology,2012,49(3):87-93
[14]肖明清.武汉长江隧道工程概况[J].土工基础,2005,19(1):2-4Xiao Mingqing.General Situation of Changjiang Tunnel Engineering in Wuhan[J].Soil Engineering and Foundation,2005,19(1):2-4
[15]李雪平,李云安,汪洋,等.基于GIS与数值模拟的三峡水库库首区诱发地震危险性评价[J].工程地质学报,2010,18(3):345 -350Li Xueping,Li Yun'an,Wang Yang,et al.GIS and Numerical Simulation Techniques Based Risk Assessment of Induced Earthquake in Three-Gorge Reservoir Head Area[J].Journal of Engineering Geology,2010,18(3):345-350
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